Karnataka SSLC 10th Science Question Paper 2025

According to Fleming's left-hand rule: the thumb indicates the direction of the force (motion) on the conductor, the index finger indicates the direction of the magnetic field, and the middle finger indicates the direction of the electric current.

The power $P = 840 W$ and voltage $V = 220 V$. Using the formula $P = VI$, the current $I = P / V = 840 / 220 \approx 3.82 A$. Since the fuse rating must be slightly higher than the operating current to prevent nuisance tripping, a 4A fuse is the appropriate choice.

The angle of deviation is inversely proportional to the wavelength of the light. Among blue, green, and yellow light, blue light has the shortest wavelength and thus undergoes the maximum deviation through a glass prism. Since Q represents the blue light ray, the angle of deviation is maximum in Q.

The symbol for a rheostat (variable resistance) is typically drawn as a resistor symbol with an arrow pointing across it, or an arrow pointing to the middle of the resistor symbol.

Particles 'B' have a larger size. Rayleigh scattering explains that shorter wavelengths are scattered by smaller particles (like air molecules scattering blue light), while larger particles (like dust or water droplets) scatter longer wavelengths, such as red light.