برقیات، مقناطیسیت اور سرکٹ

Inside a conductor in electrostatic equilibrium, the electric field is:

• 1 Equal to the field outside
• 2 Zero
• 3 Maximum
• 4 Infinite

Kirchhoff's junction rule is based on the conservation of:

• 1 Charge
• 2 Momentum
• 3 Mass
• 4 Energy

A charged particle moves at right angles to a uniform magnetic field. If its speed is doubled, the radius of its circular path:

• 1 Stays the same
• 2 Becomes four times as large
• 3 Halves
• 4 Doubles

The peak voltage of an AC supply is 311 V. What is its approximate rms value?

• 1 155 V
• 2 311 V
• 3 220 V
• 4 440 V

What is the inductive reactance of a 0.1 H inductor at 50 Hz? (Take pi = 3.14)

• 1 314 ohm
• 2 3.14 ohm
• 3 5 ohm
• 4 31.4 ohm

An ideal ammeter should have:

• 1 Resistance equal to the circuit
• 2 Very high resistance
• 3 Infinite capacitance
• 4 Zero resistance

The SI unit of self-inductance is the:

• 1 Henry
• 2 Farad
• 3 Tesla
• 4 Weber