A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and being short circuited through a resistance of 10Ω. Its internal resistance is
Options
(a) 2.0 ohm […]
24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected to an external resistance of 1.5 ohms. To get maximum current,
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(a) all cells are connected in […]
A photon of energy 10.2 eV collide inelastically with hydrogen atom in ground state after few microseconds another photon of energy 15 eV collides inelastically with same hydrogen atom. Finally by a suitable detector we […]
A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage produced in the secondary coil is 2200 V and 50% of power is lost, then […]
10 mA current can pass through a galvanometer of resistance 25 ohm. What resistance in series should be connected through it, so that it is converted into a voltmeter of 100V?
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(a) […]
Wb/m² is equal to
Options
(a) henry (b) watt (c) tesla (d) dyne
Correct Answer:
tesla
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting […]
Dimensions [ML⁻¹T⁻¹] are related with
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(a) Work (b) Torque (c) Energy (d) Coefficient of viscocity
Correct Answer:
Coefficient of viscocity
Explanation:
The coefficient of viscosity F=ηA(dV/dx) η=F/A(dV/dx) =MLT⁻²/[L²T⁻¹] η=[ML⁻¹T⁻¹].
Match the following columns Column i Column ii A. Inelastic collision Kinetic energy of the system may decrease B. Elastic collisions Kinetic energy of the system may increase C. Total work done is zero kinetic […]
For inelastic collision between two spherical rigid bodies
Options
(a) the total kinetic energy is conserved (b) the total mechanical energy is not conserved (c) the linear momentum is not conserved (d) the linear […]
A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 ft tall building. After a fall of 30 ft each towards the earth,their respective kinetic energies will […]
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