If the temperature of the sun were to increase from T to 2T and its radius from R and 2R, then the ratio of the radiant energy received on earth to what it was previously […]
A metal conductor of length 1m rotates vertically about one of its ends at angular velocity 5 radian per second. If the horizontal component of earth’s magnetic field is 0.2×10⁻⁴ T, then the e.m.f. developed […]
A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls nor rises. The charge on the drop will be (Take the mass of the charge=9.9×10⁻¹⁵ kg and […]
A nucleus disintegrates into two nuclear parts which have their velocities in the ratio 2 : 1. The ratio of their nuclear sizes will be
Options
(a) 2¹/³ : 1 (b) 1 : 3¹/² […]
Alternating current cannot be measured by D.C Ammeter because
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(a) A.C cannot pass through D.C Ammeter (b) A.C changes direction (c) Average value of current for complete cycle is zero (d) D.C […]
In an LCR series A.C circuit, the voltage across each of the components, L, C and R is 50V. The voltage across the L.C combination will be
Options
(a) 50 V (b) 50 […]
When npn transistor is used as an amplifier
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(a) electrons move from base to collector (b) holes move from emitter to base (c) electrons move from collector to base (d) holes move from […]
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