Learn the pattern, not just the answer.

The SI unit of electric current is

1. 1Coulomb
2. 2Ampere
3. 3Henry
4. 4Farad

Power dissipated in a resistor is given by

1. 1P = I^2 R
2. 2P = V / R
3. 3P = IR^2
4. 4P = V^2 / R^2

1 kWh is equal to how many joules?

1. 13.6 x 10^4
2. 23.6 x 10^5
3. 33.6 x 10^6
4. 43.6 x 10^7

Acceleration due to gravity on the surface of Earth is given by (R is radius, M is mass, G is gravitational constant)

1. 1GR^2 / M
2. 2GM^2 / R^2
3. 3GR^2 / M^2
4. 4GM / R^2

Two spheres of masses 20 kg and 16 kg are separated by 2 m. The gravitational force between them is (G is gravitational constant)

1. 180G
2. 260G
3. 340G
4. 420G

An object is dropped from a height of 10 m. With g = 9.8 m/s^2, the speed with which it hits the ground is

1. 110 m/s
2. 212 m/s
3. 314 m/s
4. 4Zero

An electron enters a magnetic field at right angles to it, as shown in the source figure. The direction of force acting on the electron will be

1. 1To the right
2. 2To the left
3. 3Out of the page
4. 4Into the page

The rate of change of momentum with respect to time is called

1. 1Acceleration
2. 2Energy
3. 3Power
4. 4Force

The speed of light in vacuum is

1. 13 x 10^8 cm/s
2. 23 x 10^8 m/s
3. 33 x 10^8 km/s
4. 43 x 10^8 km/h

A sound wave in air is

1. 1Transverse
2. 2Longitudinal
3. 3Electromagnetic
4. 4Either longitudinal or transverse

An object is placed 20 cm from a convex mirror of focal length 10 cm. The image is formed at a distance

1. 120 cm in front
2. 26.66 cm in front
3. 320 cm behind
4. 46.66 cm behind

Which of the following is a conductor of electricity?

1. 1Air
2. 2Dried wood
3. 3Water
4. 4Rubber

A 2 A current flows through a 40 ohm conductor for one minute. The heat generated is

1. 19.6 x 10^3 J
2. 296 x 10^3 J
3. 3960 x 10^3 J
4. 49600 x 10^3 J

The frequency range of audible sound for humans is

1. 10 Hz - 30 Hz
2. 220 Hz - 20 kHz
3. 320 kHz - 20,000 kHz
4. 420 kHz - 20 MHz

If an object is placed 15 cm from a concave mirror of focal length 10 cm, the image is

1. 1Magnified and inverted
2. 2Magnified and erect
3. 3Small and inverted
4. 4Small and erect

A wave travels at 960 m/s. If 3600 waves pass a point in 1 minute, find its wavelength in metres.

Find the angle of reflection in degrees from the source figure.

Find the equivalent resistance between A and B in the given source figure, in ohms.

Calculate the current drawn from the cell in amperes using the given source circuit.

A 5 kg body is thrown vertically upward with kinetic energy 490 J. At what height, in metres, does its kinetic energy become half the original value? Use g = 9.8 m/s^2.

If the distance between two spherical bodies is increased four times, by how many times must the mass of one body change to maintain the same gravitational force?

A concave mirror has radius of curvature 24 cm. Find the magnitude of object distance if the image is virtual and three times the object size.

The radius of curvature of a convex mirror is 2 m. Find its focal length in metres.

A 6 ohm resistor is connected across a 12 V battery. Find the current drawn in amperes.

Find the effective resistance between P and Q in the given source figure, in ohms.