A 2 Ω resistance is connected to a 4Ω resistance in series. Their equivalent resistance will be?

The component of white light that has maximum refractive index is?

Which of the following statements is/are correct?

1. (A) Resistance is independent of temperature.
2. (B) The more the voltage across a conductor, the more is the resistance.
3. (C) The S.I unit of resistance is ohm.

Identify the INCORRECT relation between power (P). Current(I), Resistance (R) and potential difference (V)?

Which of the following statements is are true for a number of resistors connected in parallel combination?

1. (1) All the resistors are connected between two given points.
2. (ii) The equivalent resistance of the circuit is more than the individual resistance.
3. (iii) The potential difference across each resistor is same.

The magnification produced by a lens is 1/2. The nature and the relative size of the image formed by the lens in the respective order is?

In which direction does a freely suspended bar magnet point?

Three bulbs A, B and C rated 40 W, 60 W and 100 W, respectively, are connected in parallel to a voltage source of 220 V. The bulb that glows with maximum brightness is?

Which of the following materials is preferably used in making heating elements of electrical heating devices?

Two resistors of 4Ω each are connected in parallels to a 5 V battery source. The total current in the circuit is?

A wire of a given material has length '1' and resistance 'R'. Another wire of the same material having nine times the length and the same area of cross section will have a resistance equal to?

An electric heater is rated 2200 W at 220 V. The minimum rating of the fuse wire to be connected to the device is?

Which of the following is/are useful effort(s) for sustainability of resources?

1. a. Switching off unnecessary lights and fans
2. b. Using lift instead of stairs
3. c. Repairing leaking taps for conserving water
4. d. Using empty containers to store things
5. e. Going to school by your own car instead of cycling

A magnet, when moved near a coil, produces an induced potential difference in the coil, What happens when we increase the speed of the magnet near the coil?

The resistance of a conductor is directly proportional to?

The resistance of a conductor is NOT dependent on?

The focal length of a diverging lens is 50 cm. The power of the lens is?

Two wires A and B are made of same material and have the same length but different cross-sectional areas. If the resistance. of wire A is 9 times the resistance of wire B, the ratio of the radius of wire A to that of wire B is?

A metallic wire having resistivity p is cut into four equal parts. The resistivity of each part is?

Magnification produced by a lens is equal to?

Which of the following statements is/are correct?

1. (i) Magnetic field strength is strongest at the centre of a bar magnet.
2. (ii) No two magnetic field lines can intersect.
3. (iii) Magnetic field lines always form closed continuous curves.

A boy focusses a sharp image of a distant object on a screen using a lens. The distance between the approximately equal to?

Which of the following statements are correct?

1. (a). For a lens the first principal focus is the position of the object whose image is at infinity
2. (b) For a lens the first principal focus is the position of the object whose image is formed at twice the focal length.
3. (c) For a lens the second principal focus is the position of the real image whose object is at infinity
4. (d) For a lens the second principal focus is the position of the object whose image is formed at twice the focal length

A wire of a given material has length "I' and resistance "R". Another wire of the same material having three times the length and twice the area of cross section will have a resistance equal to:

There are four different points on a plane such that no three are collinear. The number of distinct straight lines that can be drawn through them is?

A given resistance R is cut into 2 equal parts. The resistance of each part is?

An object placed at a distance of 25 cm from a converging lens forms a real and inverted image at 30 cm from the lens. The magnification produced by the lens is equal to:

In accordance with Fleming’s left hand rule used to find the force on a current-carrying conductor placed inside a magnetic field, the thumb and the index finger represent the directions of …………… and …………… , respectively?

Which of the following types of images can be obtained on a screen?

1. (a) Real and enlarged
2. (b) Real and diminished
3. (c) Virtual and enlarged
4. (d) Virtual and diminished

The part of an electric motor that reverses the direction of flow of current in it is?

Which of the following statements is/are correct for a current-carrying solenoid?

1. (i) It can be used to magnetize a piece of soft iron.
2. (ii) It acts like a bar magnet.
3. (iii) The field lines are concentric circles

"Through which process does water spread quickly in soil?"

How many times a half moon is visible in a month?

What is the expansion of NASA?

Why does a mechanic apply grease between the moving parts of a bicycle or a motor?

Which Greek letter denotes wavelength?

സൂര്യഗ്രഹണത്തിനു കാരണമാവുന്ന ശരിയായ ക്രമീകരണം കണ്ടെത്തുക.

1. ഭൂമിക്കും സൂര്യനുമിടയിൽ ചന്ദ്രൻ വരുന്നു
2. ചന്ദ്രനും സൂര്യനുമിടയിൽ ഭൂമി വരുന്നു
3. സൂര്യനും ഭൂമിക്കുമിടയിൽ ബുധൻ വരുന്നു
4. ചന്ദ്രനും ഭൂമിക്കുമിടയിൽ സൂര്യൻ വരുന്നു.

റേഡിയോ ആക്ടിവിറ്റി കണ്ടെത്തിയത് ?

ന്യൂക്ലിയാർ റിയാക്ടറിലെ ഇന്ധനം ഏത് ?

ഉപഗ്രഹങ്ങൾ ഇല്ലാത്ത ഗ്രഹം

താഴെ പറയുന്നവയിൽ സൂര്യഗ്രഹണ വുമായി ബന്ധപ്പെട്ട തെറ്റായ പ്രസ്താവന ഏത് ?

. സൗരയൂഥത്തിൽ ഏതൊക്കെ ഗ്രഹ ങ്ങളുടെ ഭ്രമണപഥങ്ങൾക്ക് ഇടയിലാണ് ഭൂമിയുടെ ഭൂമണപഥം ?

താഴെ നല്കിയിരിക്കുന്നവയിൽ ഭൗതിക മാറ്റം ഏതാണ് ?

ലോകത്തിലെ ആദ്യത്തെ മൈക്രോസെൻസർ അടിസ്ഥാനമാക്കിയുള്ള എക്‌സ്‌പ്ലോസീവ് ട്രേസ് ഡിറ്റക്ടർ ( ഇടിഡി ) കണ്ടെത്തിയ സർവ്വകലാശാല ഏതാണ് ?

ജലവുമായി പ്രവർത്തിച്ച് നാനോഫൈബറുകൾ ഉണ്ടാക്കാൻ ശേഷിയുള്ള ചെറിയ തന്മാത്രകൾ കണ്ടെത്തിയത് ഏത് സർവ്വകലാശാലയിലെ ഗവേഷകരാണ് ?

Rotation axis coupled with a translation parallel to the rotation axis will give rise to a symmetry operation known as

The operation by square of j vector operates on a vector rotates it through an angle

According to Galilean transformation equation what is invariant?