a AB b BC Q13 A battery of emf 10V and internal resistance
Last updated: 6/21/2023
a AB b BC Q13 A battery of emf 10V and internal resistance 30 is connected to a resistor The current in the circuit is 0 5A The terminal voltage of the battery when the circuit is closed is a 10 V b 0 V c 1 5 V d 8 5V Q14 When three identical bulbs of 60 W 200 V rating are connected in series to a 200 V supply the power drawn by them will be a 20 W b 60 W 180 0 1 Q15 A long solenoid carrying a current produces a magnetic field B along its axis If the current is doubled and the number of turns per cm is halved the new value of the magnetic field is b 2B d B 2 a B c 4B B c CD Q16 The value of angle of dip at a place where vertical component and horizontal component of earth s magnetic are equal a 60 b 45 a proportional to 2 180 0 c zero only if 0 180 c 180 W Q17 If the beams of electrons and protons move parallel to each other in the same direction then they a Attract each other b repel each other c no relation d neither attract nor repel Q18 A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R One of the arcs AB of the ring subtends an angle 8 at the centre The value of magnetic field at the centre due to current in the ring is b NAB c 30 Q19 What is the angle of dip at the magnetic poles a 30 b 30 Q21 The role of inductance is equivalent to a Inertia b force d DE Q24 The Unit of electric dipole moment is a Newton c Coulomb d 10 W c 45 d 90 b inversely proportional to r d zero for all value of 0 Q20 The magnetic flux linked with a coil of N turns of area of cross section A held with its plane parallel to the field B is a NAB 2 C NAB 4 c energy Q22 Identify the wrong statement a Eddy currents are produced in a steady magnetic field b Eddy currents can be minimized by using laminated core c Induction furnace uses eddy current to produce heat d Eddy current can be used to produce braking force in moving trains c Farad d None of these d Zero Q23 In series LCR circuit the phase angle between the supply voltage and current is a Tan XL XC R b Tan R XL XC c Tan R XL XC d momentum d Tan XL Xc R d Debye Q25 Point out the correct statement s about the validity of Kirchhoff s junction rule a It is based on law of conservation of charge b outgoing currents add up and are equal to incoming currents at a junction c bending or reorienting the wire does not change the validity of Kirchhoff s junction rule d all of these SECTION B This section consists of 24 multiple choice questions with overall choice to attempt any 20 questions In case more than desirable number of questions is attempted ONLY first 20 will be considered for evaluation Q26 The no of turns in the primary coil of a transformer is 200 and the no of turns in the secondary is 10 If 240 V a c is applied to primary the output from the secondary a 6 V b 12 V c 24 V d 48 V Q27 Figure shows the electric field lines of a positive point charge The work done by the field in moving a small positive charge from Q to P is