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Two bodies with moments of inertia I 1 and I 2 (I 1>I 2 ) have equal angular momenta. If their kinetic energies of rotation are E1 and E 2 respectively, then
29
Sep
Two bodies with moments of inertia I 1 and I 2 (I 1>I 2 ) have equal angular momenta. If their kinetic energies of rotation are E1 and E 2 respectively, then then Two bodies with moments of inertia I 1 and I 2 (I 1>I 2 ) have equal angular momenta. If their kinetic [...]
In Fig. a massive rod AB is held in horizontal position by two massless strings. If the string at B breaks and if the horizontal acceleration of centre of mass, vertical acceleration and angular acceleration of rod about the centre of mass are ax, ay respectively, then
26
Sep
In Fig. a massive rod AB is held in horizontal position by two massless strings. If the string at B breaks and if the horizontal acceleration of centre of mass, vertical acceleration and angular acceleration of rod about the centre of mass are ax, ay respectively, then ay respectively In Fig. a massive rod AB [...]
A particle moves along positive branch of the curve, y = x/2, where x = t^3/3, x and y are measured in meters and t in seconds, then
25
Sep
A particle moves along positive branch of the curve, y = x/2, where x = t^3/3, x and y are measured in meters and t in seconds, then A particle moves along positive branch of the curve then where x = t^3/3 x and y are measured in meters and t in seconds y = [...]
A man holds an umbrella at 30 with the vertical to keep himself dry. He, then, runs at a speed of 10 m/s, and find the rain drops to be hitting vetically. Study the following statements and find the correct options.
24
Sep
A man holds an umbrella at 30 with the vertical to keep himself dry. He, then, runs at a speed of 10 m/s, and find the rain drops to be hitting vetically. Study the following statements and find the correct options. A man holds an umbrella at 30 with the vertical to keep himself dry. [...]
A ball is thrown at different angles with the same speed u and from the same point and it has the same range in both the cases. If y1 and y2 are the heights attained in the two cases, then
22
Sep
A ball is thrown at different angles with the same speed u and from the same point and it has the same range in both the cases. If y1 and y2 are the heights attained in the two cases, then A ball is thrown at different angles with the same speed u and from the [...]
A system of binary stars of masses MA and MB are moving in circular orbits of radii RA and RB respectively. If TA and TB are the time periods of masses MA and MB respectively, then
22
Sep
A system of binary stars of masses MA and MB are moving in circular orbits of radii RA and RB respectively. If TA and TB are the time periods of masses MA and MB respectively, then A system of binary stars of masses MA and MB are moving in circular orbits of radii RA and [...]
A man standing on the edge of the terrace of a high rise building throws a stone, vertically up with at speed of 20 m/s. Two seconds later, an identical stone is thrown vertically downwards with the same speed of 20 m/s ,. Then
21
Sep
A man standing on the edge of the terrace of a high rise building throws a stone, vertically up with at speed of 20 m/s. Two seconds later, an identical stone is thrown vertically downwards with the same speed of 20 m/s ,. Then A man standing on the edge of the terrace of a [...]
Consider a resistor of uniform cross-sectional area connected to a battery of internal resistance zero. If the length of the resistor is doubled by stretching it, then
21
Sep
Consider a resistor of uniform cross-sectional area connected to a battery of internal resistance zero. If the length of the resistor is doubled by stretching it, then Consider a resistor of uniform cross-sectional area connected to a battery of internal resistance zero. If the length of the resistor is doubled by stretching it then September [...]
Four identical electrical lamps are labelled 1.5 V 0.5 A which describes the condition necessary for them to operate at normal brightness. A 12 V battery of negligible internal resistance is connected to lamps as shown, then
21
Sep
Four identical electrical lamps are labelled 1.5 V 0.5 A which describes the condition necessary for them to operate at normal brightness. A 12 V battery of negligible internal resistance is connected to lamps as shown, then then Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt [...]
The resistance of a heater coil is 110 ohm. A resistance R is connected in parallel with it and the combination is joined in series with a resistance of 11ohm to a 220 volt main line. The heater operates with a power of 110 watt. The value of R in ohm is
21
Sep
The resistance of a heater coil is 110 ohm. A resistance R is connected in parallel with it and the combination is joined in series with a resistance of 11ohm to a 220 volt main line. The heater operates with a power of 110 watt. The value of R in ohm is then Two bulbs [...]