Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I would be
Options
(a) [ML²T⁻²] (b) [ML²T⁻¹I⁻¹] (c) [ML²T⁻³I⁻²] […]
A black body is at 727⁰C. It emits energy at a rate which is proportional to
Options
(a) (1000)⁴ (b) (1000)² (c) (727)⁴ (d) (727)²
Correct Answer:
(1000)⁴
Explanation:
According to Stefan’s law, E […]
A car moves from X to Y with a uniform speed v(u) and returns to Y with a uniform speed v(d). The average speed for this round trip is
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(a) √v(u)v(d) (b) […]
A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so […]
A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. […]
A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are (√3,3). The path of the particle makes with the x-axis […]
The position x of a particle with respect to time t along x-axis is given by x = 9t² – t³ where x is in metres and t in second. What will be the position […]
Which of the following animal and morphological feature pairs are correctly matched ?(i) Crocodile – 4-chambered heart (ii) Sea urchin – Parapodia(iii) Obelia – Thecodont(iv) Lemur – Thecodont
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(a) (ii), (iii) and […]
If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
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(a) nature of stored food materials in the cell (b) structural organization of […]
Passage cells are thin walled cells found in
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(a) phloem elements that serve as entry points for substance for transport ot other plant parts (b) testa of seeds to enable emergence of […]
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