Physics-
General
Easy
Question
Two cells of emf e1 and e2 (e 2 < e1 ) are joined as shown in figure
The correct answer is:
……….(i)
…..(ii)
where, is the potential gradient
Related Questions to study
Physics-
In the circuit diagram a capacitor which is initially uncharged is connected to an ideal cell of emf e through a resistor ‘R’. A leaky dielectric fills the space between the plates of dielectric. The capacitance of the capacitor with dielectric is C. Resistance of the dielectric is R¢ = R.
In the circuit diagram a capacitor which is initially uncharged is connected to an ideal cell of emf e through a resistor ‘R’. A leaky dielectric fills the space between the plates of dielectric. The capacitance of the capacitor with dielectric is C. Resistance of the dielectric is R¢ = R.
Physics-General
Physics-
AB is potentiometer wire of resistance per unit length 0.09 W/cm and e is an unknown emf of a battery to be measured. e cannot be measured using the potentiometer shown if the value of e is (select the most appropriate answer)
AB is potentiometer wire of resistance per unit length 0.09 W/cm and e is an unknown emf of a battery to be measured. e cannot be measured using the potentiometer shown if the value of e is (select the most appropriate answer)
Physics-General
Physics-
The time when the voltage across the resistor drops to nearly 37% of the value just after the switch Sw is closed : (R = 100 kW, C = 1mF) is
The time when the voltage across the resistor drops to nearly 37% of the value just after the switch Sw is closed : (R = 100 kW, C = 1mF) is
Physics-General
Physics-
Three batteries are connected as shown in figure. Reading of ideal ammeters A1 ,A2 & A3 are :
Three batteries are connected as shown in figure. Reading of ideal ammeters A1 ,A2 & A3 are :
Physics-General
Physics-
Four resistances are connected by an ideal battery of emf 50 volt, circuit is in steady state then the current in wire AB is :
Four resistances are connected by an ideal battery of emf 50 volt, circuit is in steady state then the current in wire AB is :
Physics-General
Physics-
If an ideal cell of emf 5 volt shown in the figure gives a power of 10 W , find the powers consumed by the resistors 2 W and 1 W.
If an ideal cell of emf 5 volt shown in the figure gives a power of 10 W , find the powers consumed by the resistors 2 W and 1 W.
Physics-General
Physics-
Five bulbs B1 , B2 , B3 and B4 each of rating 60W / 200V and B5 of rating 120W /400V are connected as shown in circuit. Total power consumption by all the bulbs is :
Five bulbs B1 , B2 , B3 and B4 each of rating 60W / 200V and B5 of rating 120W /400V are connected as shown in circuit. Total power consumption by all the bulbs is :
Physics-General
Physics-
In the shown circuit, all three capacitor are identical and have capacitance C mF each. Each resistor has resistance of R W. An ideal cell of emf V volts is connected as shown. Then the magnitude of potential difference across capacitor C3 in steady state is
In the shown circuit, all three capacitor are identical and have capacitance C mF each. Each resistor has resistance of R W. An ideal cell of emf V volts is connected as shown. Then the magnitude of potential difference across capacitor C3 in steady state is
Physics-General
Physics-
Conductor of length l has shape of a semi cylinder of radius R (<< l). Cross section of the conductor is shown in the figure. Thickness of the conductor is t (<< R) and conductivity of its material varies with angle q according to the law s = s0 cosq where s0 is a constant. If a battery of emf e is connected across its end faces (across the semi–circular cross-sections), the magnetic induction at the mid point O of the axis of the semi-cylinder is :
Conductor of length l has shape of a semi cylinder of radius R (<< l). Cross section of the conductor is shown in the figure. Thickness of the conductor is t (<< R) and conductivity of its material varies with angle q according to the law s = s0 cosq where s0 is a constant. If a battery of emf e is connected across its end faces (across the semi–circular cross-sections), the magnetic induction at the mid point O of the axis of the semi-cylinder is :
Physics-General
Physics-
Block A of mass m is placed on a plank B. A light support S is fixed on plank B and is attached with the block A with a spring of spring constant K. Consider that initially spring is in its natural length. If the plank B is given an acceleration a, then maximum compression in the spring is k xma . Find the value of x. (All the surfaces are smooth)
Block A of mass m is placed on a plank B. A light support S is fixed on plank B and is attached with the block A with a spring of spring constant K. Consider that initially spring is in its natural length. If the plank B is given an acceleration a, then maximum compression in the spring is k xma . Find the value of x. (All the surfaces are smooth)
Physics-General
Physics-
A block B of mass 10 kg is placed on smooth horizontal surface over it another block A of same mass is placed. A horizontal force F is applied on block B
S1 : No block will move unless F > 10 N.
S2 : Block A will move towards left.
S3 : Acceleration of block B will never be less than that of A.
S4 : The relative motion between A and B will start when F exceeds 10 N.
A block B of mass 10 kg is placed on smooth horizontal surface over it another block A of same mass is placed. A horizontal force F is applied on block B
S1 : No block will move unless F > 10 N.
S2 : Block A will move towards left.
S3 : Acceleration of block B will never be less than that of A.
S4 : The relative motion between A and B will start when F exceeds 10 N.
Physics-General
Physics-
O is a point at the bottom of a rough plane inclined at an angle a to the horizontal. Coefficient of friction between AB is 
and between BO is
. B is the mid–point of AO. A block is released from rest at A. Then identify which graphs are correct during motion of block from point A to O taking direction down the incline plane as positive (sina = 1/5) :
O is a point at the bottom of a rough plane inclined at an angle a to the horizontal. Coefficient of friction between AB is and between BO is. B is the mid–point of AO. A block is released from rest at A. Then identify which graphs are correct during motion of block from point A to O taking direction down the incline plane as positive (sina = 1/5) :
Physics-General
Physics-
ABC is a triangle in vertical plane. Its two base angles ÐBAC and ÐBCA are 45º and tan–1 (1/3) respectively. A particle is projected from point A such that it passes through vertices B and C. Find angle of projection in degrees:
ABC is a triangle in vertical plane. Its two base angles ÐBAC and ÐBCA are 45º and tan–1 (1/3) respectively. A particle is projected from point A such that it passes through vertices B and C. Find angle of projection in degrees:
Physics-General
Chemistry-
The space between nucleus and electrons in an atom is
The space between nucleus and electrons in an atom is
Chemistry-General
Chemistry-
Rutherford’s experiment on scattering of alpha particles showed for the first time that atom has:
Rutherford’s experiment on scattering of alpha particles showed for the first time that atom has:
Chemistry-General
