A. Charcoal
B. Silicon Carbide
C. Nichrome
D. Graphite
Which of the following are the passive elements?
A. Resistor
B. Bulb
C. Both
D. None of these.
When the element is not capable of delivering energy independently, are called as passive element. Both resistor and bulb are the passive elements and they can’t increase the energy level of a circuit
With rise in temperature the resistance of pure metals______________?
A. increases
B. decreases
C. first increases and then decreases
D. remains constant
The rating of a fuse wire is always expressed in________________?
A. ampere-hours
B. ampere-volts
C. kWh
D. amperes
74. Sparking occurs when a load is switched off because the circuit has high_________?
A. resistance
B. inductance
C. capacitance
D. impedance
Capacitor does not allow the sudden change of ?
A. current
B. voltage
C. power
D. None of the above
The expression of current through a capacitor is
For sudden change of voltage infinite current is required. But practically it is not possible.
Practical capacitor circuit has finite value of time constant
Which of the following has no units?
A. Permeability
B. Moment of a magnet
C. Magnetic susceptibility
D Permittivity
Magnetic susceptibility is the degree to which a material is magnetized by an external magnetic field, hence in the SI system it is dimensionless.