MCQ
The wire wound resistor is also known as:
- AVariable resistor
- BRheostat
- CCircular coil
- DBoth a and b
Explanation:
It is rheostat

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The work function for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein’s equation, the metals which will emit photo electrons for a radiation of wavelength 4100 Å is/are
|
(a) None of these |
(b) A only |
(c) A and B only |
(d) All the three metals |
A condenser has a capacity 2μF and is charged to a voltage of 50 V. The energy stored is
|
(a) 25 × 105 Joule |
(b) 25 Joule |
(c) 25 × 10 erg |
(d) 25 × 103 erg |
The measurement of voltmeter in the following circuit is
|
(a) 2.4 V |
(b) 3.4 V |
(c) 4.0 V |
(d) 6.0 V |