0% Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 12345678910 Physics Class- 12 This Quiz Contains a Set of 10 Questions. Passing cut-off is 60%. To Start the Quiz... Click on the Start Button. All the Best. 1 / 10 Two points A and B are maintained at a potential of 6 V and -4 V respectively. The work done in moving an electron from A to B is: 1.6 x 10-18 J -1.6 x 10-18 J 1.6 x 10-20 J -1.6 x 10-20 J 2 / 10 A point object is placed at the centre of a glass sphere of radius 6 cm and refractive index 1.5. The distance of the virtual image from the surface of the sphere is: 2 cm 4 cm 6 cm 12 cm 3 / 10 If both the number of turns and the core length of an inductor are doubled keeping other factors consistent, then its self-inductance will be- Unaffected doubled halved quadrupled 4 / 10 Three capacitors 2μF, 3μF and 6μF are joined in series. The equivalent capacitance is- 1/2 μF 1 μF 2 μF 11 μF 5 / 10 N identical drops each having charge q and potential V coalesce to form a big drop. The charge and potential on the big drop will be: Nq and NV respectively Nq and N1/3V respectively Nq and N2/3V respectively Nq and V/N respectively 6 / 10 Which among the following, is not a cause for power loss in a transformer- Eddy currents are produced in the soft iron core of a transformer. Electric Flux sharing is not properly done in primary and secondary coils. Humming sound produed in the transformers due to magnetostriction. Primary coil is made up of a very thick copper wire. 7 / 10 According to Coulomb's law, which is the correct relation for the following figure? q1 x q2 > 0 q1 x q2 < 0 q1 x q2 = 0 1 > q1 x q2 > 0 8 / 10 If n identical cells each of emf Ɛ and internal resistance r are connected in parallel. Their equivalent emf and equivalent resistance will be: Ɛ/n and r/n respectively nƐ and nr respectively Ɛ and r/n respectively nƐ and r/n respectively 9 / 10 The physical quantity given below cannot be negative: Distance Displacement Temperature None of the above 10 / 10 We need to step up the voltage for power transmission, so that the current is reduced and consequently, the I2R loss is cut down the voltage is increased , the power losses are also increased the power is increased before transmission is done the voltage is decreased so V2/R losses are reduced Your score is 0% Restart quiz
