The potential difference between the ends of a conductor is 12 V. How much electrical energy is converted to other forms of energy in the conductor when 100 C of charge flows through it?

• A) 1200 J
• B) 88 J
• C) 0.12 J
• D) 8.3 J

Capacitance of a capacitor in vacuum is given by:

• A) A/ εo d
• B) Ad/ εo
• C) A εo /d
• D) A/ εr d

If the voltage in a circuit is 10 volts and the resistance is 5 ohms, what is the power consumed?

• A) 2 watts
• B) 20 watts
• C) 10 watts
• D) 50 watts

Radio waves and light waves are __________.

• A) Longitudinal waves
• B) Transverse waves
• C) Electromagnetic and longitudinal both
• D) Electromagnetic and transverse both

If 0.5 T field over an area of 2m2 which lies at an angle of 600 with field. Then the resultant flux will be

• A) 0.25 Wb
• B) 0.50 T
• C) 0.50 Wb
• D) 0.25 T

If the electric and magnetic forces on a charged particle are not balanced in a velocity selector, what will happen to the particle?

• A) It will be deflected.
• B) It will stop moving.
• C) It will move in a straight line.
• D) It will be accelerated.

How is charge density defined for linear charge distribution?

• A) dq = dA
• B) dq = σds
• C) dq = pdV
• D) dq = λds

Phase difference between V and I of an A.C through resistor is:

• A) 270 degree
• B) 0 degree
• C) 180 degree
• D) 90 degree

How could the unit of potential difference, the volt, also be written?

• A) A/s
• B) C/A
• C) J/C
• D) C/J

A student rubs a rod held in his hand.
Which action causes the rod to gain a large electrostatic charge?

• A) Rubbing a polythene rod with a steel magnet
• B) Rubbing an iron rod with a steel magnet
• C) Rubbing an iron rod with a woolen duster
• D) Rubbing a polythene rod with a woolen duster

The wavelength of red light is 700 nm. Its frequency is ______.

• A) 4.29 * 10^15 Hertz
• B) 4.29 * 10^12 Hertz
• C) 4.29 * 10^13 Hertz
• D) 4.29 * 10^14 Hertz

What is the relationship between the electric field (E) and the dipole moment (p) at a point (r) on the axial line of the dipole?

• A) E = p/r
• B) E ∝ p/r²
• C) E = p
• D) E ∝ p/r³

What is the unit of charge distribution for linear density?

• A) Coulomb / length2
• B) length / Coulomb
• C) Length/ Farad
• D) Coulomb / length

It is required to suspend a proton of charge q and mass m in an electric field. The strength of field must be:

• A) m/qv
• B) mg/q
• C) qv/mg
• D) q/mg

If magnetic field is doubled then magnetic energy density becomes:

• A) Six times
• B) Three times
• C) Two times
• D) Four times

Under what condition is induced electromotive force (EMF) produced in a conductor?

• A) When there is a strong magnetic field
• B) When there is a strong electric field
• C) When there is a constant magnetic field
• D) When there is a time-varying magnetic field

What does effect the introduction of dielectric material have on the relative permittivity (ϵr​) in a capacitor?

• A) Remains constant
• B) Becomes zero
• C) Decreases
• D) Increases

If F is the force acting on the test charge qo, the electric field intensity E would be given by

• A) E = F + qo
• B) E = F - qo
• C) E = F/qo
• D) E = qo/F

If the drift velocity vd of charge carriers in a conductor increases, what happens to the current density J?

• A) J becomes negative.
• B) J decreases.
• C) J increases.
• D) J remains unchanged.

Greenhouse gases absorb _____ radiation.

• A) infrared
• B) ultraviolet
• C) gamma
• D) microwaves