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A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in the box, estimate the amount of ice remaining after 6 h. The outside temperature is 45
24
Oct
A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in the box, estimate the amount of ice remaining after 6 h. The outside temperature is 45 A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg [...]
The opposite face of a cubical block of iron of cross-section 4.0 cm^2 are kept in contact with steam and melting ice. Calculate the quantity of ice melted in 10 minutes
24
Oct
The opposite face of a cubical block of iron of cross-section 4.0 cm^2 are kept in contact with steam and melting ice. Calculate the quantity of ice melted in 10 minutes The opposite face of a cubical block of iron of cross-section 4.0 cm^2 are kept in contact with steam and melting ice. Calculate the [...]
Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points A and B are maintained at different temperatures.
24
Oct
Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points A and B are maintained at different temperatures. Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The [...]
The only possibility of heat flow in a thermos flask is through its cork which is 75 cm^2 in area and 5 cm thick. Its thermal conductivity is 0.0075 cal/cm-sec-C. The outside
24
Oct
The only possibility of heat flow in a thermos flask is through its cork which is 75 cm^2 in area and 5 cm thick. Its thermal conductivity is 0.0075 cal/cm-sec-C. The outside The only possibility of heat flow in a thermos flask is through its cork which is 75 cm^2 in area and 5 cm [...]
In the given circuit , what is the current I ( in A ) drawn from battery at time t = 0 .
24
Oct
In the given circuit , what is the current I ( in A ) drawn from battery at time t = 0 . In the given circuit what is the current I ( in A ) drawn from battery at time t = 0 . October 24, 2020 Category: Uncategorised (JEE Advanced Physics by BM [...]
At any instant a current of 2 A is increasing at a rate of 1 A/s through a coil of inductance 2 H. Find the energy ( in SI units ) being stored in the inductor per unit time at that instant.
24
Oct
At any instant a current of 2 A is increasing at a rate of 1 A/s through a coil of inductance 2 H. Find the energy ( in SI units ) being stored in the inductor per unit time at that instant. At any instant a current of 2 A is increasing at a rate [...]
Steel wire of length L at 40 C is suspended from the ceiling and then a mass m is hung from its free end. The wire is cooled down from 40 C to 30 C to regain its original length L.
24
Oct
Steel wire of length L at 40 C is suspended from the ceiling and then a mass m is hung from its free end. The wire is cooled down from 40 C to 30 C to regain its original length L. Steel wire of length L at 40 C is suspended from the ceiling and [...]
Figure shows a circuit having a coil of resistance R = 2.5 Ω and inductance L connected to a conducting rod of radius 10 cm with its center at P.Assume that friction and gravity are absent and a constant uniform magnatic field of 5T exists as shown in figure. At t=0, the circuit is switched on and simultaneously a time-varying external torque is applied on the rod so that it rotates about P with a constant angular velocity 40rads−1. Find the magnitude of this torque (in mNm) when current reaches half of its maximum value. Neglect the self inductance of the loop formed by the circuit.
24
Oct
Figure shows a circuit having a coil of resistance R = 2.5 Ω and inductance L connected to a conducting rod of radius 10 cm with its center at P.Assume that friction and gravity are absent and a constant uniform magnatic field of 5T exists as shown in figure. At t=0, the circuit is switched [...]
A capacitor of capacity 2 μF is charged to a potential difference of 12 V. It is then connected across an inductor of inductance 6μH. What is the current (in A) in the circuit at a time when the potential difference across the capacitor is 6.0 V?
24
Oct
A capacitor of capacity 2 μF is charged to a potential difference of 12 V. It is then connected across an inductor of inductance 6μH. What is the current (in A) in the circuit at a time when the potential difference across the capacitor is 6.0 V? A current of 2 A is increasing at [...]
A long solenoid of diameter 0.1 m has 2 × 10 ^ 4 turns per metre. At the center of the solenoid, a 100-turn coil of radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid is decreased at a constant rate from +2 A to – 2 A in 0.05 s. Find the total charge (in μC) flowing through the coil during this time when the resistance of the coil is 40 π ^ 2 Ω.
24
Oct
A long solenoid of diameter 0.1 m has 2 × 10 ^ 4 turns per metre. At the center of the solenoid, a 100-turn coil of radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid is decreased at a constant rate from +2 A to – [...]