- AMoving magnet
- BStationary magnet
- CMoving charge
- DStationary charge
Explanation:
Magnetic fields are produced by magnetic bodies (Moving or stationary).
Moving charges produce electromagnetic fields. Stationary charges produce electric fields alone.
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If the binding energy of the deutrium is 2.23 MeV. The mass defect given in a.m.u. is
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(a) – 0.0024 |
(b) – 0.0012 |
(c) 0.0012 |
(d) 0.0024 |
One cannot see through fog because .......... :
Assertio : Hydrogen atom consists of only one electron but its emission spectrum has many lines.
Reason : Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
A galvanometer of 25 W resistance can read a maximum current of 6mA. It can be used as a voltmeter to measure a maximum of 6 V by connecting a resistance to the galvanometer. Identify the correct choice in the given answers
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(a) 1025 W in series |
(b) 1025 W in parallel |
(c) 975 W in series |
(d) 975 W in parallel |
Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 W when a potential difference of 20 V is applied between its ends
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(a) 120 C |
(b) 240 C |
(c) 20 C |
(d) 4 C |