Skip to content Home Questions Play Progress Daily Challenge Questions › Physics › Electric Current and Its Effects Questions QUESTION Which statement describes a direct use of the magnetic attraction of an electromagnet? I. Separating magnetic materials from scrap or junk II. Sharpening a… Open question → QUESTION In electricity, which symbol is used to represent the net electric charge that passes through any cross-section of a conductor? Open question → QUESTION Which option lists precious metals commonly used to electroplate less expensive decorative ornaments? Open question → QUESTION For an ordinary metallic conductor over a modest temperature range, what generally happens to its resistance as temperature rises? Open question → QUESTION Which fundamental principle enables a transformer to change the magnitude of an AC voltage while keeping its frequency constant? Open question → QUESTION A 6-volt supply is applied to a parallel combination of two resistors having values of 2 Ω and 4 Ω. How much total current… Open question → QUESTION Nichrome is widely used as a heating element in electric appliances because: Open question → QUESTION A 60 W electric lamp is used for 5 hours daily. How much energy (in ‘units’) will it consume in 30 days? Open question → QUESTION For an ohmic conductor at unchanged temperature, resistance is doubled while potential difference is kept constant. What happens to the current? Open question → QUESTION According to Lenz's Law, what determines the direction of an induced current in a conductor? Open question → QUESTION A uniform wire of resistance R is cut into two equal lengths without changing its cross-section or resistivity. The halves are connected in parallel.… Open question → QUESTION An electric kettle operates continuously at its rated power of 2.2 kW for 30 minutes. At ₹4 per kWh, what is the electricity cost? Open question → QUESTION Two positive ohmic resistances R1 and R2 are connected in parallel across the same nonzero potential difference. If R1 is less than R2, what… Open question → QUESTION Match the column: Column A (Conductor Type) | Column B (Mobile Charge Carriers) A. Metal | 1. Positive and negative ions B. Ionised gas… Open question → QUESTION A conductor rod moves with velocity v perpendicular to a uniform magnetic field B. If the length of the rod perpendicular to both v… Open question → Home Questions Play Progress 