The insulation on a current carrying conductor is provided__________?
The insulation on a current carrying conductor is provided__________?
A. to prevent leakage of current
B. to prevent shock
C. both of above factors
D. none of above factors
The insulation on a current carrying conductor is provided__________?
A. to prevent leakage of current
B. to prevent shock
C. both of above factors
D. none of above factors
Two resistors are said to be connected in series when___________?
A. same current passes in turn through both
B. both carry the same value of current
C. total current equals the sum of branch currents
D. sum of IR drops equals the applied e.m.f.
Which of the followings is/are active element?
A. Voltage source
B. Current source
C. Both
D. None of these.
Active elements are capable of delivering energy independently for long time or ideally infinite time. Both voltage and current source are active element and they can change energy level of a circuit.
A. magnetic effect
B. luminous effect
C. thermal effect
D. chemical effect
E. all above effects
A resistance having rating 10 ohms, 10 W is likely to be a__________?
A. metallic resistor
B. carbon resistor
C. wire wound resistor
D. variable resistor
The condition for the validity under Ohm’s law is that_______________?
A. resistance must be uniform
B. current should be proportional to the size of the resistance
C. resistance must be wire wound type
D. temperature at positive end should be more than the temperature at negative end
Which quantity should be measured by the voltmeter ?
A. Current
B. Voltage
C. Power
D. Speed
Voltmeter is a high resistance device used for measuring potential difference or voltage. It must be connected in parallel for measurement