An ammeter whose resistance is 180 Ω gives full scale deflection when current is 2 mA. The shunt required to convert it into an ammeter reading 20 mA (in ohms) is
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(a) 18 |
(b) 20 |
(c) 0.1 |
(d) 10 |
(b) 20
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Consider the charge configuration and spherical Gaussian surface as shown in the figure. When calculating the flux of the electric field over the spherical surface the electric field will be due to
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(a) |
(b) Only the positive charges |
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(c) All the charges |
(d) + |
The current between B and D in the given figure is
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(a) 1 amp |
(b) 2 amp |
(c) Zero |
(d) 0.5 amp |
Assertion : A narrow pulse of light is sent through a medium. The pulse will retain its shape as it travels through the medium.
Reason : A narrow pulse is made of harmonic waves with a large range of wavelengths.
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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 assertion is false but reason is true. |
In the figure a potential of + 1200 V is given to point A and point B is earthed, what is the potential at the point P
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(a) 100 V |
(b) 200 V |
(c) 400 V |
(d) 600 V |
