The time period of a simple pendulum in a lift descending with constant acceleration g is
Options
(a) T=2π√l/g (b) T=2π√l/2g (c) zero (d) Infinite
Correct Answer:
Infinite
Explanation:
When the lift falls […]
Streptomyces fradiae produces
Options
(a) Aureomycin (b) Terramycin (c) Neomycin (d) Erythromycin
Correct Answer:
Neomycin
Explanation:
Streptomyces fradiae is a species of Actinobacteria. There are many strains of S.fradiae are known to produce the […]
The dimensions of magnetic field intensity B are
Options
(a) MLT⁻²A⁻¹ (b) MT⁻²A⁻¹ (c) ML²TA⁻² (d) M²LT⁻²A⁻¹
Correct Answer:
MT⁻²A⁻¹
Explanation:
Dimensions of B = [MT⁻²A⁻¹] F = Bil sin θ [MLT⁻²] = [B] […]
Before using the tangent galvanometer, its coil is set in
Options
(a) Magnetic meridian (b) Perpendicular to magnetic meridian (c) At angle of 45⁰ to magnetic meridian (d) It does not require any […]
Time taken by light to cross a glass slab of thickness 4 mm and refractive index 3 is
Options
(a) 4×10⁻¹¹ sec (b) 2×10⁻¹¹ sec (c) 16×10⁻¹¹ sec (d) 8×10⁻¹¹ sec
Correct Answer:
4×10⁻¹¹ […]
Potential at a point x-distance from the centre inside the conducting sphere of redius r and carrying a charge Q is
Options
(a) Q/R (b) Q/x (c) Q/x² (d) xQ
Correct Answer:
xQ
The bandgap in Germanium and silicon, in eV, are respectively
Options
(a) 0.7 and 1.1 (b) 1.1 and 0.7 (c) 1.1 and zero (d) zero and 1.1
Correct Answer:
0.7 and 1.1
Explanation: […]
P-type semiconductors are made by adding impurity element
Options
(a) As (b) P (c) B (d) Bi
Correct Answer:
B
Explanation:
No explanation available. Be the first to write the explanation for this […]
Magnetic flux φ (in weber) linked with a closed circuit of resistance 10 Ω varies with time t (in sec) as φ=5t²-4t+1. The induced e.m.f. in the circuit at 0.2 sec is
Options
Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 sec. Given L=10 µH.
Options
(a) 1 V (b) 1 µV (c) 1 mV (d) 0.1 V
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