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A circuit consists of a coil, a switch and a battery, all in series. The interval resistance of the battery is negligible compared with that of the coil. The switch is originally open. It is thrown closed, after a time interval Δt. The current in the circuit reaches 80.0% of its final value. The switch then remains closed for a time interval much longer than Δt. The wires connected to the terminals of the battery are then short circuited with another wire and removed from the battery, so that the current is uninterrupted. At the moment 2Δt after the coil is short-circuited, the current in the coil is what percentage of its maximum value?
21
Oct
A circuit consists of a coil, a switch and a battery, all in series. The interval resistance of the battery is negligible compared with that of the coil. The switch is originally open. It is thrown closed, after a time interval Δt. The current in the circuit reaches 80.0% of its final value. The switch [...]
In figure , e = 110 V , R1 = 10 ohm , r2 = 20 ohm , r3 = 30 ohm and l = 2 h (a)imeediately after switch Sw is closed (b)a long time after ( c)immediately after Sw is opended again (d)a long time later.
21
Oct
In figure , e = 110 V , R1 = 10 ohm , r2 = 20 ohm , r3 = 30 ohm and l = 2 h (a)imeediately after switch Sw is closed (b)a long time after ( c)immediately after Sw is opended again (d)a long time later. e = 110 V In figure R1 [...]
In a circuit S1 remains closed for a long time and s2 re,mains open. Now s2 is closed and s1 is opened. Find out the di/dt in the right loop just after that moment.
21
Oct
In a circuit S1 remains closed for a long time and s2 re,mains open. Now s2 is closed and s1 is opened. Find out the di/dt in the right loop just after that moment. In a circuit S1 remains closed for a long time and s2 re mains open. Now s2 is closed and s1 [...]
AB is the part of circuit. Find the potential difference Va – Vb if
21
Oct
AB is the part of circuit. Find the potential difference Va – Vb if AB is the part of circuit. Find the potential difference Va - Vb if October 21, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
Suppose the emf of the battery, the circuit shown varies with time t so the current is given by i(t)=3+5t, where i is in amperes & t is in seconds. Take R = 4 Ω, L= 6 H & find an expression for the battery emf as function of time.
21
Oct
Suppose the emf of the battery, the circuit shown varies with time t so the current is given by i(t)=3+5t, where i is in amperes & t is in seconds. Take R = 4 Ω, L= 6 H & find an expression for the battery emf as function of time. L= 6 H & find [...]
Keeping the angle of banking, if the radius of curvature is made four times, the percentage increase in the maximum speed with which a vehicle can travel on a circular road is
21
Oct
Keeping the angle of banking, if the radius of curvature is made four times, the percentage increase in the maximum speed with which a vehicle can travel on a circular road is if the radius of curvature is made four times Keeping the angle of banking the percentage increase in the maximum speed with which [...]
A car of mass 1000kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45^∘ the speed of the car is:
21
Oct
A car of mass 1000kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45^∘ the speed of the car is: A car of mass 1000kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45^∘ the speed of the car [...]
A coin, placed on a rotating turntable slips, when it is placed at a distance of 9 cm from the center. If the angular velocity of the turntable is tripled, it will just slip, If its distance from the center is
21
Oct
A coin, placed on a rotating turntable slips, when it is placed at a distance of 9 cm from the center. If the angular velocity of the turntable is tripled, it will just slip, If its distance from the center is A coin If its distance from the center is it will just slip placed [...]
A car is taking turn on a circular path of radius R. If the coefficient of friction between the tyres and road is μ, the maximum velocity for no slipping is
21
Oct
A car is taking turn on a circular path of radius R. If the coefficient of friction between the tyres and road is μ, the maximum velocity for no slipping is A car is taking turn on a circular path of radius R. If the coefficient of friction between the tyres and road is μ [...]
A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle, its speed is 20cm/s & acceleration is 20cm/s^2. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed & acceleration will be:
21
Oct
A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle, its speed is 20cm/s & acceleration is 20cm/s^2. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed & acceleration [...]
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A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle ,
its speed is 20cm/s & acceleration is 20cm/s^2. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed & acceleration will be: ,