Question: In a purely inductive circuit__________?

• 1. actual power is zero
• 2. reactive power is zero
• 3. apparent power is zero
• 4. none of above is zero

Question: Inductance of coil___________?

• 1. is unaffected by the supply frequency
• 2. decreases with the increase in supply frequency
• 3. increases with the increase in supply frequency
• 4. becomes zero with the increase in supply frequency

Question: Time constant of a capacitive circuit__________?

• 1. increases with the decrease of capacitance and decrease of resistance
• 2. increases with the decrease of capacitance and increase of resistance
• 3. increases with the increase of capacitance and decrease of resistance
• 4. increase with increase of capacitance and increase of resistance

Question: In any A.C. circuit always__________?

• 1. apparent power is more than actual power
• 2. reactive power is more than apparent power
• 3. actual power is more than reactive power
• 4. reactive power is more than actual power

Question: In a series L-C circuit at the resonant frequency the__________?

• 1. current is maximum
• 2. current is minimum
• 3. impedance is maximum
• 4. voltage across C is minimum

Question: The surge resistance of cable is__________?

• 1. 5 ohms
• 2. 20 ohms
• 3. 50 ohms
• 4. 100 ohms

Question: In capacitance grading of cables we use a _______ dielectric?

• 1. composite
• 2. porous
• 3. homogeneous
• 4. hygroscopic

Question: PVC stands for____________?

• 1. polyvinyl chloride
• 2. post varnish conductor
• 3. pressed and varnished cloth
• 4. positive voltage conductor

Question: Conduit pipes are normally used to protect _______ cables:

• 1. unsheathed cables
• 2. armoured
• 3. PVC sheathed cables
• 4. all of the above

Question: The material for armouring on cable is usually__________?

• 1. steel tape
• 2. galvanised steel wire
• 3. any of the above
• 4. none of the above