Maharashtra SSC (Class 10) Effects of Electric Current — practice questions
33 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Maharashtra SSC (Class 10) Effects of Electric Current in the app →A resistor of 22 Ω is connected across a 220 V supply. What is the electrical power dissipated in it?A nichrome wire of resistance 22 Ω is cut to half its length so that its resistance becomes 11 Ω, and reconnecA cell connected across a 9 Ω resistance produces heat at the rate of 400 J per second. What is the potential An electric iron uses 1100 W at its higher setting on a 220 V supply. What current does it draw at this settinAn electric iron at its lower setting uses 330 W on a 220 V supply. What is the resistance of the iron at thisA tungsten bulb on a 220 V supply draws a current of 0.45 A. What is its power rating?A 99 W bulb is kept switched on for 10 hours. How many units (kWh) of electrical energy does it consume?According to Joule's law of heating, the heat produced in a resistor R carrying current I for time t is given One unit of electrical energy on a domestic bill equals 1 kWh. Expressed in joules, 1 kWh is equal to:Heat energy is produced in a resistor of a circuit at the rate of 100 W while a current of 3 A flows through iTwo tungsten bulbs of 100 W and 60 W are connected in parallel across a 220 V supply. What is the total currenWhich consumes more electrical energy: a 500 W TV set running for 30 minutes, or a 600 W heater running for 20An electric iron of 1100 W is operated for 2 hours daily through April at a tariff of Rs 5 per unit. What is tWhich alloy is used as the resistive coil in heating appliances like electric heaters and cookers because of iIn an electric bulb the filament gets heated to nearly 3400 °C and emits light. Which material is used for thiA fuse wire is fitted in a household circuit primarily to:In a domestic supply, the 'live' and 'neutral' wires are maintained at a potential difference of:Which scientist observed in 1820 that a magnetic needle near a current-carrying wire turns through an angle, rThe magnetic lines of force around a long, straight current-carrying conductor are best described as:The right-hand thumb rule is used to find the direction of the magnetic field around a current-carrying conducA solenoid has n turns instead of a single loop, with the same current. Compared with a single loop, the magneThe magnetic field produced by a current-carrying solenoid most closely resembles the field of a:A current-carrying conductor is placed in a magnetic field. The force on it is maximum when the current is dirIn Fleming's left-hand rule, with the thumb, index finger and middle finger held mutually perpendicular, the mAn electric motor is a device that converts:In a simple DC electric motor, which component reverses the direction of current in the coil after every half Electromagnetic induction is best described as the:Which scientist demonstrated in 1831 that an electric current can be produced in a conductor with the help of Fleming's right-hand rule gives the direction of the induced current. In this rule, the thumb points along theIn India, the frequency of the alternating current (AC) supplied by power stations is:Which statement correctly distinguishes alternating current (AC) from direct current (DC)?An electric generator differs from an AC generator in its use of a split ring instead of two slip rings. The pA galvanometer detects small currents and shows their direction. On which principle does it work?