Related InterviewSolutions

• In insulators (CB is conduction band and VB is valence band )A. VB is partially filled with electronsB. CB is partially filled with electronsC. CB is empty and VB is filled with electronsD. CB is filled with electrons and VB is empty
• A body is moved along a straight line by a machine delivering constant power . The distance moved by the body is time `t` is proptional toA. `t^(1//2)`B. `t^(2//3)`C. `t`D. `t^(3//2)`
• In cyclotron for a given magnet radius of the semicircle traced by positive ion is directly proportional to (where v= velocity of positive ion)A. `v^(-2)`B. `v^(-1)`C. `v`D. `v^(2)`
• The angle `theta` between the vector `p=hati+hatj +hatk` and unit vector along X-axis isA. `cos^(-1) ((1)/(sqrt3))`B. `cos^(-1) ((1)/(sqrt2))`C. `cos^(-1) ((sqrt3)/(2))`D. `cos^(-1)((1)/(2))`
• The massses of the three wires of copper are in the ratio 1 : 3 : 5. And their lengths are in th ratio 5 : 3 : 1. the ratio of their electrical resistance isA. `25 : 1 : 125`B. `1 : 125 : 25`C. `125 : 1 : 25`D. `125 : 25 : 1`
• If average velocity of a sample of gas molecules at 300 K is `5 cm s^(-1)` , what is RMS velocity of same sample of gas molecules at the same temperature ? (Given , `alpha : u : v = 1 : 1 .224 : 1.127)`A. 6.112 cm/sB. 4.605 cm/sC. 4.085 cm/sD. 5.430 cm/s
• A block rests on a horizontal table which is executing SHM in the horizontal plane with an amplitude A. What will be the frequency of oscillation, the block will just start to slip? Coefficient of friction`=mu`.A. `(1)/(2pi ) sqrt((mu g)/(A))`B. `(1)/(4pi ) sqrt((mu g)/(A))`C. `2pi sqrt((A)/(mu g))`D. `4pi sqrt((A)/(mu g))`
• In common base circuit of a transistor , current amplification factor is `0.95`. Calculate the emitter current , if base current is `0.2` mAA. 2 mAB. 4 m AC. 6 mAD. 8 mA
• Light of wavelength `lambda_(A)` and `lambda_(B)` falls on two identical metal plates A and B respectively . The maximum kinetic energy of photoelectrons in `K_(A)` and `K_(B)` respectively , then which one of the following relations is true ? `(lambda_(A) = 2lambda_(B))`A. `K_(A) lt (K_(B))/(2)`B. `2 K_(A) = K_(B)`C. `K_(A) = 2K_(B)`D. `K_(A) gt 2 K_(B)`
• The relation between force `F` and density `d` is `F=(x)/(sqrt(d))`. The dimension of `x` isA. `[L^(-1//2) M^(3//2) T^(-2)]`B. `[L^(-1//2) M^(1//2) T^(-2)]`C. `[L^(-1) M^(3//2) T^(-2)]`D. `[L^(-1) M^(1//2) T^(-2)]`